In the CHI'91 conference proceedings there is a paper called "Building
Visual Language Parsers". The paper presents constrained set grammars and
mentions some tools that were developed: a parser generator, a parser
animator, and a constraint visualizer. This sounds very interseting.

Does anyone know if the tools are available? Does anyone have any
references to similar papers or tools?
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Denis Bohm (denis@redwood.com -or- denisb@leland.stanford.edu)
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